Budget-Friendly Android Apps For Security Monitoring

Mobile network and performanance analysis doesn't have to be a costly. Find out how to turn a $100 Android device and some mobile apps into a security Swiss army knife.

Network analysis tablets -- full-suite devices that automate security monitoring -- are a welcome addition to the toolkit IT departments use to assess the health and performance of their hardware and software. But too often, the price tags of fully-loaded tablets far exceed the limits of the typical IT department budget.

The good news is that with a $100 investment in a basic Android tablet and a few apps, you may be able to add enough mobility to your network and security analysis operation to get by.

Here are three of my favorites.

Fing network utilityFing is an Android implementation of the Look@LAN freeware product for Windows OS, Linux, or Mac OS. It performs network discovery on IP networks you configure, and it will display the NetBIOS or DNS name, MAC address, and vendor (not a full OS version detect). Select any individual IP address, and you can ping, traceroute, or query the DNS name of the host or do a service scan (full or partial listening port enumeration). You can save scans to SD. If you subscribe to the Fingbox cloud service, you can automate TCP service monitoring, receive discovery or alert notifications, or remotely reboot hosts via Sentinels you install on networks you monitor.

WiFi AnalyzerYou can find hundreds of WiFi scanners on app stores. WiFi Analyzer views offer pretty much all you need from a scanner. You can scan signal strength automatically or by intervals, identify the optimal channel to use for a given access point (AP), and enumerate APs. One graphing function displays the signal strength of all APs over time. A second visualizes APs by signal strength and channel. You can configure the app to display APs that share the same SSID and security individually or as a group, set aliases for discovered APs, and display full security settings. It's fancy, fast, and free.

UltraToolsUltraTools provides a collection of network analysis, performance, and diagnostic tools and more. The app has so many utilities it comes with a dashboard. For network analysis purposes, the port scanner, visual traceroute, DNS lookup, and ping complement Fing nicely.

For network or performance engineering purposes, UltraTools provides a connection speed test, a DNS speed test, and an IPv6 connectivity test. You can also run a terrific set of checks against your domain with Domain Health Report, one of the utilities you can access from the UltraTools dashboard.

The Domain Health Report scans include a DNS record validity check of authoritative zone data, name server(s) configuration, and DNSSEC and IPv6 support for name service (AAAA resource records). The scanner drills down through the targeted zone's resource records, performs MX record validity and consistency checks, and connects to each mail server enumerated to assess whether its responses conform to best-practices. The scanner also performs validity checks on each web server enumerated in the authoritative zone.

The information in the Domain Health Report provides security engineers with data you don't typically find in other utilities. The scan reports on mail server health and behaviors (returns valid banners, responds to ports 25/587, has SPF records, responds to abuse@domain email) and tells you whether the mail server is on the real-time block list (RBL). It also reports on web server behaviors (has public IPs, IPs have reverse DNS entries, has CNAME records). You can also query web servers for server software version, home page HTTP headers, META tags and load time, and SSL certificate validation.

This app can also be a powerful investigation tool when run against a domain you suspect is malicious (e.g., a suspected phishing site or spam relay). The scans will often reveal misconfigurations commonly found on servers run by attackers. You can investigate further by querying the Whois or the RBL, or you can geolocate the suspicious server through the UltraTools dashboard. This freeware app is about as comprehensive a utility as you'll find.

The apps I've recommended are available via Google Play, the Amazon App store, or directly from the developer. None require you to root your tablet. I've installed these on a Android tablet I bought for less than $100, and I have had no issues. A small investment of this kind may reap benefits orders of magnitude larger.

This article originally appeared in The Transformed Datacenter on 7/15/2013.

Enterprises today have a wide range of third-party options to help improve their defenses, including MSSPs, auditing and penetration testing, and DDoS protection. But are there situations in which a service provider might actually increase risk?

It's one thing to hire a third-party developer to build a mobile app. It's quite another to trust a pen tester, MSSP, or DDoS protection firm. But the fact is, the threat landscape is complex, and few organizations can keep security completely in house. Here's how to decide what to outsource and select and manage providers.

Published: 2015-03-03Off-by-one error in the ecryptfs_decode_from_filename function in fs/ecryptfs/crypto.c in the eCryptfs subsystem in the Linux kernel before 3.18.2 allows local users to cause a denial of service (buffer overflow and system crash) or possibly gain privileges via a crafted filename.

Published: 2015-03-03** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Further investigation showed that it was not a security issue in customer-controlled software. Notes: none.

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